Yes, I've also read Morten, Todd, and now All Drupal Themes. Here's my take:

The growth of Drupal themes will directly mirror the growth of custom distributions. We are currently in the "it's so easy, we click together lots of Drupal modules from scratch" phase. Once there are more Open Atrium and ProsePoint type of distributions, with known modules / module options and features, then you can build great themes to support those functions.

Form follows function. I've tried to explain this a million times in the D7 process. Having a "great" core theme is impossible when we don't decide what kind of site Drupal should be optimized for out of the box. This same holds true for trying to build and market a theme that will apply and work well with the many vastly different kind of sites that one can build with Drupal.

I imagine that most of you see the default theme for this site -- the "notables" one that I created.

I try and wander through the forums and bug reports at Drupal.org (the code that runs this site) every so often, because I'm still excited about where it's headed.